A boulder wall or manufactured retaining block wall is a great visual and functional addition to your landscape design. If your property is on a grade or has a slope to it, you can use walls to retain soil and create more functional areas. You can also add walls to create terraced gardens, seat walls around patios, and create additional outdoor spaces to be used for entertaining and relaxing. These walls can also be used to complement surrounding structures and give an added touch of class to your landscape.